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Heating & Air Conditioning

COOLING fan will not shut off. Sometimes

Richard Romanowski

2 years ago

last modified: 2 years ago

When my system reaches temp my indoor fan keeps running sometimes i can get it to stop by lowering the temp. then when i hear the compressor kick on i raise the temp drastically and the compressor and indoor fan turn off. this is about 50% succesfull. i thought a fan relay but wouldn't it be stuck on all the time?

Featured Answer

mike_home

2 years ago

Do you know the model number of your thermostat? Some thermostats have a cool to dehumidify feature. The thermostat continues to call for cooling even if the set temperature is reached. If the thermostat runs on a battery, verify they are good. When the battery is low, thermostats have a tendency to have strange behavior.

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Comments (11)

klem1
2 years ago
Is jacking the t-stat a quick fix you found on a forum like this? Keep it up and you'll soon be asking why it no longer cool's.
Richard Romanowski thanked klem1
Richard Romanowski
Original Author
2 years ago
Just kind of a troubleshooting thing to give more information to the tech. Do you think it could still be a relay?
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Richard Romanowski
Original Author
2 years ago
So i now have a nest, but it did the exact same thing with my Honeywell Tstat and the old white rogders
Richard Romanowski
Original Author
2 years ago
Also if i agut off the system with the switch and turn it back on the fan still runs
Richard Romanowski
Original Author
2 years ago
Shut
Richard Romanowski
Original Author
2 years ago
Sorry more infobro: i have an upstairs and downstairs unit downstairs works fine. same units same tstats
mike_home
2 years ago
Can you turn the fan on and off from the thermostat?
Richard Romanowski thanked mike_home
Richard Romanowski
Original Author
2 years ago
Went into the attic and found the relay. tapped on it and off went the fan. pn essex 134-10103-333A replacement shows rodgers 90-370. hope that is correct. ordered one for tomorrow. thanks for all the help.
Stax
2 years ago
last modified: 2 years ago
"Customers who viewed this item also viewed" doesn't necessarily mean it is a "replacement.

EDIT: Seems it may well work. "The replacement relay works for my old White Rodgers 134-10103-333A. Only difference is 5 vs 6 pin. Just study the diagram and you're good to go."
Richard Romanowski thanked Stax
Richard Romanowski
Original Author
2 years ago
Ya i read that exact commentmy, hoping it works.

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